package com.yuns.common.utils;

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * @author liuchengwen
 * @desc 使用token验证用户是否登录
 */
public class TokenUtils {
    //设置过期时间
    private static final long EXPIRE_DATE =12 * 60 * 60 * 1000;  //12个小时过期
    //token秘钥
    private static final String TOKEN_SECRET = "ZCfasfhuaUUHufguGuwu2020BQWE";

    public static String token(String username, String password) {
        String token = "";
        try {
            //过期时间
            Date date = new Date(System.currentTimeMillis() + EXPIRE_DATE);
            //秘钥及加密算法
            Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);
            //设置头部信息
            Map<String, Object> header = new HashMap<>();
            header.put("typ", "JWT");
            header.put("alg", "HS256");
            //携带username，password信息，生成签名
            token = JWT.create()
                    .withHeader(header)
                    .withClaim("username", username)
                    .withClaim("password", password).withExpiresAt(date)
                    .sign(algorithm);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
        return token;
    }

    public static String token_phone(String phone,String code) {
        String token = "";
        try {
            //过期时间
            Date date = new Date(System.currentTimeMillis() + EXPIRE_DATE);
            //秘钥及加密算法
            Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);
            //设置头部信息
            Map<String, Object> header = new HashMap<>();
            header.put("typ", "JWT");
            header.put("alg", "HS256");
            //携带username，password信息，生成签名
            token = JWT.create()
                    .withHeader(header)
                    .withClaim("phone", phone)
                    .withClaim("code",code)
                    .withExpiresAt(date)
                    .sign(algorithm);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
        return token;
    }

    public static boolean verify(String token) {
        /**
         * @desc 验证token，通过返回true
         * @params [token]需要校验的串
         **/
        try {
            Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);
            JWTVerifier verifier = JWT.require(algorithm).build();
            DecodedJWT jwt = verifier.verify(token);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

//    public static void main(String[] args) {
//        String username = "zhangsan";
//        String password = "123";
//        String token = token(username, password);
//        System.out.println(token);
//        boolean b = verify("eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJwYXNzd29yZCI6IjEyMyIsImV4cCI6MTYwNTU3Nzg3MywidXNlcm5hbWUiOiJ6aGFuZ3NhbiJ9.f-K38MNm50k50k7XmfsjAG5IMkiKbBLODsj4xuhBdzc");
//        System.out.println(b);
//    }
}
